Txheej txheem cej luam thiab kev faib tawm cov yeeb yaj kiab polyvinyl cawv (PVA) zaj duab xis
1 Txheej txheem cej luam
Polyvinyl cawv (PVA) yog dej-soluble polymer cov yam ntxwv zoo ntawm kev ua kom muaj kev sib xyaw zoo, siab tawg, muaj zog adhesion, thiab cov yeeb yaj kiab uas ua tiav yog hloov tau, du, roj resistant, hnyav tiv taus, puas resistant, thiab roj teeb meem tiv taus. Thiab dej tsis kam ntawm kev kho tshwj xeeb muaj ntau yam siv.
Cov dej cawv Polyvinyl tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis muaj mob rau tib neeg lub cev, muaj kev sib txuam zoo nrog cov ntuj puag ncig, tsis nthuav tawm, thiab tsis muaj kuab lom.
Cov yeeb yaj kiab polyvinyl cawv yog ntsuab ua haujlwm cov khoom siv uas yog tseem ceeb ntawm cov dej cawv polyvinyl, ntxiv nrog hloov kho thiab lwm yam tshuaj ntxiv, thiab tuaj yeem raug xeb los ntawm cov kab mob me me hauv av tom qab kev ua haujlwm tshwj xeeb. Nws degrades rau hauv carbon dioxide thiab dej nyob rau lub sijhawm luv luv thiab muaj cov nyhuv ntawm kev txhim kho thaj av.
Qhov loj tshaj plaws zoo ntawm polyvinyl cawv zaj duab xis yog dej solubility, qhov cuam tshuam loj tshaj yog dej tsis zoo. Qhov laj thawj yog vim li cas cov dej tiv thaiv tsis zoo yog vim yog qhov ua rau hydrophilic hydroxyl pawg (-OH) hauv cov roj molecule. Yog tias pawg hydroxyl tuaj yeem tiv thaiv kom zoo thiab cov dej tiv thaiv pawg txuas nrog, cov dej tiv thaiv ntawm PVA zaj duab xis tuaj yeem txhim kho. PVA muaj cov pab pawg hydroxyl, thiab txhua cov kev cuam tshuam los ntawm polyols tuaj yeem nqa tawm. Cov polycondensates uas tsim nyog tuaj yeem siv los txhawm rau hla cov pawg hydroxyl hauv PVA hauv ib qho me me, kom PVA ua cov qauv muaj zog peb ntu. Nws tswj lub airtightness ntawm PVA nyob rau hauv ntub tej yam kev mob thiab txhim kho dej tsis kam.
Hauv cov ntawv thov siv, dej solubility thiab noo noo nqus dej ntawm polyvinyl cawv zaj duab xis tuaj yeem tswj tau los ntawm kev kho cov khoom nyoos, tsim thiab txheej txheem kom tau raws li qhov xav tau ntawm lub hom phiaj sib txawv.
2 kev faib tawm
Polyvinyl cawv cov yeeb yaj kiab tau muab faib ua cov khoom hauv qab no raws li lawv cov yam ntxwv solubility:
Li qub kub soluble zaj duab xis (NT yam, tseem hu ua zaj duab xis sai sai, txias ua rau cov tub ntxhais ua yeeb yaj kiab): Dissolving temperature 25 ° C
Nruab nrab kub soluble zaj duab xis (IT hom, tseem hu ua medium soluble film, kub yaj zaj duab xis): yaj siab kub 65 ° C
Kev kub siab soluble zaj duab xis (HT hom, tseem hu ua zaj duab xis tsis zoo zaj duab xis, tiv taus zaj duab xis): Kev yaj siab tshaj 85 ° C
Zaj duab xis tshwj xeeb: Cov qauv thiab cov txheej txheem tuaj yeem tsim raws li daim ntawv thov tshwj xeeb kom tau raws li qhov xav tau ntawm kev siv tshwj xeeb.
peb muab patented puv biodegradable zaj duab xis thiab lub hnab PVA, tag nrho cov khoom yog tsim los ntawm cov cuab yeej siv casting, Nws txawv ntawm cov tshuab moulding khoom, tag nrho cov tshuab moulding khoom tsis puv biodegradable. Peb tuaj yeem tsim pva zaj duab xis thiab hnab hauv pob tshab thiab pob tshab xim. thiab PVA zaj duab xis yog du ntau dua li cov tsoos tshuab moulding khoom.
peb kuj muab cov khoom siv organic puv biodegradable zaj duab xis thiab hnab nrog cov khoom muaj ntawv pov thawj muaj txheej txheem thiab cov txheej txheem.
Xav paub ntau ntxiv PVA zaj duab xis thiab hnab khoom thov mus saib peb:
http://www.joyful-printing.net/pva-bag/
http://www.joyful-printing.com/pva-bag/ eng nkaus xwb